Rumors suggest trouble in paradise between Prince William and Kate Middleton.

For years, reports of marital problems have circulated, with recent credible media adding weight to the rumours.

Prince William was rumored to have engaged in "pegging" but Kate has refused.

Author Tom Quinn wrote a book about the couple's relationship and royal children's upbringing.

William's nicknames for Kate include "Babykins" and "Duchess of Doolittle" as a joke.

William refers to Kate as "darling" with signs of annoyance when unhappy.

The couple has fallouts and fights like any other couple, throwing things at each other.

William and Kate want to be seen as an ordinary couple with the same stresses as everyone else.

Palace aides add to the stress of their daily lives.